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Problem: ======= Autoincrement value gives duplicate values because of the following reasons. (1) In InnoDB handler function, current autoincrement value is not changed based on newly set auto_increment_increment or auto_increment_offset variable. (2) Handler function does the rounding logic and changes the current autoincrement value and InnoDB doesn't aware of the change in current autoincrement value. Solution: ======== Fix the problem(1), InnoDB always respect the auto_increment_increment and auto_increment_offset value in case of current autoincrement value. By fixing the problem (2), handler layer won't change any current autoincrement value. Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com> RB: 13748
85 lines
2 KiB
Text
85 lines
2 KiB
Text
--source include/have_innodb.inc
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--source include/have_debug.inc
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--source include/not_embedded.inc
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# Two parallel connection with autoinc column after restart.
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CREATE TABLE t1 (id INT AUTO_INCREMENT PRIMARY KEY)ENGINE=INNODB;
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--echo # SETTING auto_increment_increment IN CONNECTION DEFAULT
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SET AUTO_INCREMENT_INCREMENT = 1;
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INSERT INTO t1 VALUES(NULL);
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SELECT * FROM t1;
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SHOW CREATE TABLE t1;
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--source include/restart_mysqld.inc
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--echo # SETTING auto_increment_increment IN CONNECTION1
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SET AUTO_INCREMENT_INCREMENT = 2;
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SET DEBUG_SYNC= 'ib_after_row_insert SIGNAL opened WAIT_FOR flushed1';
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SEND INSERT INTO t1 VALUES(NULL);
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connect(con1, localhost, root,,);
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SET AUTO_INCREMENT_INCREMENT = 2;
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SET DEBUG_SYNC= 'now WAIT_FOR opened';
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SET DEBUG_SYNC= 'ib_after_row_insert_step SIGNAL flushed1 WAIT_FOR opened1';
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send insert into t1 values(NULL);
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connection default;
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reap;
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SELECT * FROM t1;
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SHOW CREATE TABLE t1;
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SET DEBUG_SYNC= 'now SIGNAL opened1';
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connection con1;
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reap;
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SELECT * FROM t1;
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SHOW CREATE TABLE t1;
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connection default;
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disconnect con1;
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DROP TABLE t1;
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# Two parallel connection with autoinc column without restart.
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CREATE TABLE t1(id INT AUTO_INCREMENT PRIMARY KEY)ENGINE=INNODB;
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--echo # SETTING auto_increment_increment IN CONNECTION DEFAULT
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SET AUTO_INCREMENT_INCREMENT = 1;
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INSERT INTO t1 VALUES(NULL);
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SELECT * FROM t1;
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SHOW CREATE TABLE t1;
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SET DEBUG_SYNC = 'now SIGNAL flushed';
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connect(con1, localhost, root,,);
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--echo # SETTING auto_increment_increment in connection1
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SET AUTO_INCREMENT_INCREMENT = 2;
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SET DEBUG_SYNC= 'now WAIT_FOR flushed';
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SET DEBUG_SYNC= 'ib_after_row_insert SIGNAL opened WAIT_FOR flushed1';
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send INSERT INTO t1 values(NULL);
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connection default;
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SET DEBUG_SYNC= 'now WAIT_FOR opened';
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SET DEBUG_SYNC= 'ib_after_row_insert_step SIGNAL flushed1 WAIT_FOR opened1';
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send INSERT INTO t1 VALUES(NULL);
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connection con1;
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reap;
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SELECT * FROM t1;
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SHOW CREATE TABLE t1;
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SET DEBUG_SYNC= 'now SIGNAL opened1';
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disconnect con1;
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connection default;
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reap;
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SELECT * FROM t1;
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SHOW CREATE TABLE t1;
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DROP TABLE t1;
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SET DEBUG_SYNC='RESET';
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